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Nano-shaped hot-wire for ultra-high resolution anemometry in cryogenic helium

Abstract : We present the principle, modelling, and the first implementation of a new type of high resolution hot-wire anemometer designed to operate at cryogenic temperatures and very high Reynolds numbers. Its spatial resolution of a few micrometers is comparable to the most spatially-resolved hot-wires reported in the literature. Compared to existing designs, its fabrication involves a limited number of steps, essentially the shaping at nanoscales of a superconducting NbTi wire of sub-micron diameter. The velocity spectra in the far wake of a centimeter-sized grid is measured as a proof of concept in stringent flow conditions.
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https://hal-cea.archives-ouvertes.fr/cea-02282964
Contributor : Pantxo Diribarne <>
Submitted on : Tuesday, September 10, 2019 - 12:55:36 PM
Last modification on : Monday, March 30, 2020 - 2:02:04 PM
Document(s) archivé(s) le : Friday, February 7, 2020 - 5:45:37 PM

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NbTi_HotWires.pdf
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  • HAL Id : cea-02282964, version 1

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Pantxo Diribarne, Pierre Thibault, Philippe-Emmanuel Roche. Nano-shaped hot-wire for ultra-high resolution anemometry in cryogenic helium. Review of Scientific Instruments, American Institute of Physics, In press. ⟨cea-02282964v1⟩

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